Abstract

Biodegradable oil as insulation in transformer
currently starts being used as alternative to mineral oil due to its
dielectric properties and availability. However, moisture content in
these types of insulation oil is the real challenge especially for high
voltage application. Malaysian researchers currently try to develop
biodegradable insulation oil from palm oil based. This paper present
comparative analysis on conductivity behavior of different types of
oil which are biodegradable oil (Refined Bleached Deodorized Palm
Oil (RBDPO) and Red Palm Oil) and mineral oil (Hyrax Hypetrans
and FR3). Polarization and Depolarization Current (PDC)
measurement test was conducted on the oil sample compromised with
various thickness of insulation pressboard paper (0.2mm, 0.5mm and
1.0mm) was done in lab. In the analysis, the PDC curve was plotted
in log scales and the DC conductivity of the oil was calculated. Based
on the analysis result the different and variation of the conductivity
identify the best palm oil type that have high potential to be
commercialized as transformer insulation oil.